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Mike, this model is not Optics ready/mos but buds does have a MOS version in stock but little pricier. If interested here's a link to it. Hope this helps, link here..................... https://www.budsgunshop.com/product_info.php/products_id/112843/glock+pa455s203mos+g45+gen+5+mos+9mm+4.02+17+1

Hi Mike and welcome. Yes, you could use a dovetail plate in place of the rear sight - https://www.mountsplus.com/glock-red-dot-mount.html: - Optics Ready Model is here : https://www.budsgunshop.com/product_info.php/products_id/112843/glock+pa455s203mos+g45+gen+5+mos+9mm+4.02+17+1 - Cheers and stay safe!